Strangest/Hardest Position you've ever preformed?

Mine would have to be doggy style while sharing a double ended dildo. Not the most insane position, but hard to work with since you can't hold on to the dildo and its not always easy to thrust the same, unless you count, which isn't the sexiest thing to do.

We haven't tried a lot of crazy positions mainly because the hubs and I have a foot difference on our height. So hardest for us to do is any kind of standing position. I also find reverse cowgirl hard to do mainly because I'm not really sure how to do it.